3878761 has 2 divisors, whose sum is σ = 3878762. Its totient is φ = 3878760.

The previous prime is 3878759. The next prime is 3878767. The reversal of 3878761 is 1678783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3041536 + 837225 = 1744^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878761 - 2¹ = 3878759 is a prime.

Together with 3878759, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (3878767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939380 + 1939381.

It is an arithmetic number, because the mean of its divisors is an integer number (1939381).

Almost surely, 2^3878761 is an apocalyptic number.

It is an amenable number.

3878761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878761 is an equidigital number, since it uses as much as digits as its factorization.

3878761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 3878761 is about 1969.4570317730. The cubic root of 3878761 is about 157.1198322424.

The spelling of 3878761 in words is "three million, eight hundred seventy-eight thousand, seven hundred sixty-one".